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EP 3 665 853 A1

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(43) Date of publication: 17.06.2020 Bulletin 2020/25 (21) Application number: 18843169.6 (22) Date of filing: 09.08.2018

(51) International Patent Classification (IPC):  H04L 5/14(2006.01) H04L 1/18(2006.01) H04W 72/12(2009.01) H04L 5/00(2006.01) H04W 72/04(2009.01) (86) International application number: PCT/US2018/046018 (87) International publication number: WO 2019/032833 (14.02.2019 Gazette 2019/07)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 10.08.2017 US 201762543644 P 10.08.2017 US 201762543718 P 10.08.2017 US 201762543708 P 21.08.2017 US 201762548266 P 29.09.2017 US 201762565784 P 15.11.2017 US 201762586734 P (71) Applicant: Apple Inc. Cupertino CA 95014 (US)

(72) Inventors: YE, Qiaoyang San Jose, California 95134 (US) CHATTERJEE, Debdeep San Jose, California 95128 (US) (74) Representative: Wardle, Callum Tarn  Withers & Rogers LLP 4 More London Riverside London SE1 2AU London SE1 2AU (GB)